[PATCH 02/35] drm/amdgpu: replace per_device_list by array
Felix Kuehling
Felix.Kuehling at amd.com
Thu Jan 7 03:00:54 UTC 2021
From: Alex Sierra <alex.sierra at amd.com>
Remove per_device_list from kfd_process and replace it with a
kfd_process_device pointers array of MAX_GPU_INSTANCES size. This helps
to manage the kfd_process_devices binded to a specific kfd_process.
Also, functions used by kfd_chardev to iterate over the list were
removed, since they are not valid anymore. Instead, it was replaced by a
local loop iterating the array.
Signed-off-by: Alex Sierra <alex.sierra at amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling at amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 116 ++++++++----------
drivers/gpu/drm/amd/amdkfd/kfd_iommu.c | 8 +-
drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 20 +--
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 108 ++++++++--------
.../amd/amdkfd/kfd_process_queue_manager.c | 6 +-
5 files changed, 111 insertions(+), 147 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 8cc51cec988a..8c87afce12df 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -874,52 +874,47 @@ static int kfd_ioctl_get_process_apertures(struct file *filp,
{
struct kfd_ioctl_get_process_apertures_args *args = data;
struct kfd_process_device_apertures *pAperture;
- struct kfd_process_device *pdd;
+ int i;
dev_dbg(kfd_device, "get apertures for PASID 0x%x", p->pasid);
args->num_of_nodes = 0;
mutex_lock(&p->mutex);
+ /* Run over all pdd of the process */
+ for (i = 0; i < p->n_pdds; i++) {
+ struct kfd_process_device *pdd = p->pdds[i];
+
+ pAperture =
+ &args->process_apertures[args->num_of_nodes];
+ pAperture->gpu_id = pdd->dev->id;
+ pAperture->lds_base = pdd->lds_base;
+ pAperture->lds_limit = pdd->lds_limit;
+ pAperture->gpuvm_base = pdd->gpuvm_base;
+ pAperture->gpuvm_limit = pdd->gpuvm_limit;
+ pAperture->scratch_base = pdd->scratch_base;
+ pAperture->scratch_limit = pdd->scratch_limit;
- /*if the process-device list isn't empty*/
- if (kfd_has_process_device_data(p)) {
- /* Run over all pdd of the process */
- pdd = kfd_get_first_process_device_data(p);
- do {
- pAperture =
- &args->process_apertures[args->num_of_nodes];
- pAperture->gpu_id = pdd->dev->id;
- pAperture->lds_base = pdd->lds_base;
- pAperture->lds_limit = pdd->lds_limit;
- pAperture->gpuvm_base = pdd->gpuvm_base;
- pAperture->gpuvm_limit = pdd->gpuvm_limit;
- pAperture->scratch_base = pdd->scratch_base;
- pAperture->scratch_limit = pdd->scratch_limit;
-
- dev_dbg(kfd_device,
- "node id %u\n", args->num_of_nodes);
- dev_dbg(kfd_device,
- "gpu id %u\n", pdd->dev->id);
- dev_dbg(kfd_device,
- "lds_base %llX\n", pdd->lds_base);
- dev_dbg(kfd_device,
- "lds_limit %llX\n", pdd->lds_limit);
- dev_dbg(kfd_device,
- "gpuvm_base %llX\n", pdd->gpuvm_base);
- dev_dbg(kfd_device,
- "gpuvm_limit %llX\n", pdd->gpuvm_limit);
- dev_dbg(kfd_device,
- "scratch_base %llX\n", pdd->scratch_base);
- dev_dbg(kfd_device,
- "scratch_limit %llX\n", pdd->scratch_limit);
-
- args->num_of_nodes++;
-
- pdd = kfd_get_next_process_device_data(p, pdd);
- } while (pdd && (args->num_of_nodes < NUM_OF_SUPPORTED_GPUS));
- }
+ dev_dbg(kfd_device,
+ "node id %u\n", args->num_of_nodes);
+ dev_dbg(kfd_device,
+ "gpu id %u\n", pdd->dev->id);
+ dev_dbg(kfd_device,
+ "lds_base %llX\n", pdd->lds_base);
+ dev_dbg(kfd_device,
+ "lds_limit %llX\n", pdd->lds_limit);
+ dev_dbg(kfd_device,
+ "gpuvm_base %llX\n", pdd->gpuvm_base);
+ dev_dbg(kfd_device,
+ "gpuvm_limit %llX\n", pdd->gpuvm_limit);
+ dev_dbg(kfd_device,
+ "scratch_base %llX\n", pdd->scratch_base);
+ dev_dbg(kfd_device,
+ "scratch_limit %llX\n", pdd->scratch_limit);
+ if (++args->num_of_nodes >= NUM_OF_SUPPORTED_GPUS)
+ break;
+ }
mutex_unlock(&p->mutex);
return 0;
@@ -930,9 +925,8 @@ static int kfd_ioctl_get_process_apertures_new(struct file *filp,
{
struct kfd_ioctl_get_process_apertures_new_args *args = data;
struct kfd_process_device_apertures *pa;
- struct kfd_process_device *pdd;
- uint32_t nodes = 0;
int ret;
+ int i;
dev_dbg(kfd_device, "get apertures for PASID 0x%x", p->pasid);
@@ -941,17 +935,7 @@ static int kfd_ioctl_get_process_apertures_new(struct file *filp,
* sufficient memory
*/
mutex_lock(&p->mutex);
-
- if (!kfd_has_process_device_data(p))
- goto out_unlock;
-
- /* Run over all pdd of the process */
- pdd = kfd_get_first_process_device_data(p);
- do {
- args->num_of_nodes++;
- pdd = kfd_get_next_process_device_data(p, pdd);
- } while (pdd);
-
+ args->num_of_nodes = p->n_pdds;
goto out_unlock;
}
@@ -966,22 +950,23 @@ static int kfd_ioctl_get_process_apertures_new(struct file *filp,
mutex_lock(&p->mutex);
- if (!kfd_has_process_device_data(p)) {
+ if (!p->n_pdds) {
args->num_of_nodes = 0;
kfree(pa);
goto out_unlock;
}
/* Run over all pdd of the process */
- pdd = kfd_get_first_process_device_data(p);
- do {
- pa[nodes].gpu_id = pdd->dev->id;
- pa[nodes].lds_base = pdd->lds_base;
- pa[nodes].lds_limit = pdd->lds_limit;
- pa[nodes].gpuvm_base = pdd->gpuvm_base;
- pa[nodes].gpuvm_limit = pdd->gpuvm_limit;
- pa[nodes].scratch_base = pdd->scratch_base;
- pa[nodes].scratch_limit = pdd->scratch_limit;
+ for (i = 0; i < min(p->n_pdds, args->num_of_nodes); i++) {
+ struct kfd_process_device *pdd = p->pdds[i];
+
+ pa[i].gpu_id = pdd->dev->id;
+ pa[i].lds_base = pdd->lds_base;
+ pa[i].lds_limit = pdd->lds_limit;
+ pa[i].gpuvm_base = pdd->gpuvm_base;
+ pa[i].gpuvm_limit = pdd->gpuvm_limit;
+ pa[i].scratch_base = pdd->scratch_base;
+ pa[i].scratch_limit = pdd->scratch_limit;
dev_dbg(kfd_device,
"gpu id %u\n", pdd->dev->id);
@@ -997,17 +982,14 @@ static int kfd_ioctl_get_process_apertures_new(struct file *filp,
"scratch_base %llX\n", pdd->scratch_base);
dev_dbg(kfd_device,
"scratch_limit %llX\n", pdd->scratch_limit);
- nodes++;
-
- pdd = kfd_get_next_process_device_data(p, pdd);
- } while (pdd && (nodes < args->num_of_nodes));
+ }
mutex_unlock(&p->mutex);
- args->num_of_nodes = nodes;
+ args->num_of_nodes = i;
ret = copy_to_user(
(void __user *)args->kfd_process_device_apertures_ptr,
pa,
- (nodes * sizeof(struct kfd_process_device_apertures)));
+ (i * sizeof(struct kfd_process_device_apertures)));
kfree(pa);
return ret ? -EFAULT : 0;
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_iommu.c b/drivers/gpu/drm/amd/amdkfd/kfd_iommu.c
index 5a64915abaf7..1a266b78f0d8 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_iommu.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_iommu.c
@@ -131,11 +131,11 @@ int kfd_iommu_bind_process_to_device(struct kfd_process_device *pdd)
*/
void kfd_iommu_unbind_process(struct kfd_process *p)
{
- struct kfd_process_device *pdd;
+ int i;
- list_for_each_entry(pdd, &p->per_device_data, per_device_list)
- if (pdd->bound == PDD_BOUND)
- amd_iommu_unbind_pasid(pdd->dev->pdev, p->pasid);
+ for (i = 0; i < p->n_pdds; i++)
+ if (p->pdds[i]->bound == PDD_BOUND)
+ amd_iommu_unbind_pasid(p->pdds[i]->dev->pdev, p->pasid);
}
/* Callback for process shutdown invoked by the IOMMU driver */
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index e2ebd5a1d4de..d9f8d3d48aac 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -45,6 +45,7 @@
#include <linux/swap.h>
#include "amd_shared.h"
+#include "amdgpu.h"
#define KFD_MAX_RING_ENTRY_SIZE 8
@@ -644,12 +645,6 @@ enum kfd_pdd_bound {
/* Data that is per-process-per device. */
struct kfd_process_device {
- /*
- * List of all per-device data for a process.
- * Starts from kfd_process.per_device_data.
- */
- struct list_head per_device_list;
-
/* The device that owns this data. */
struct kfd_dev *dev;
@@ -766,10 +761,11 @@ struct kfd_process {
uint16_t pasid;
/*
- * List of kfd_process_device structures,
+ * Array of kfd_process_device pointers,
* one for each device the process is using.
*/
- struct list_head per_device_data;
+ struct kfd_process_device *pdds[MAX_GPU_INSTANCE];
+ uint32_t n_pdds;
struct process_queue_manager pqm;
@@ -867,14 +863,6 @@ void *kfd_process_device_translate_handle(struct kfd_process_device *p,
void kfd_process_device_remove_obj_handle(struct kfd_process_device *pdd,
int handle);
-/* Process device data iterator */
-struct kfd_process_device *kfd_get_first_process_device_data(
- struct kfd_process *p);
-struct kfd_process_device *kfd_get_next_process_device_data(
- struct kfd_process *p,
- struct kfd_process_device *pdd);
-bool kfd_has_process_device_data(struct kfd_process *p);
-
/* PASIDs */
int kfd_pasid_init(void);
void kfd_pasid_exit(void);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 2807e1c4d59b..031e752e3154 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -505,7 +505,7 @@ static int kfd_sysfs_create_file(struct kfd_process *p, struct attribute *attr,
static int kfd_procfs_add_sysfs_stats(struct kfd_process *p)
{
int ret = 0;
- struct kfd_process_device *pdd;
+ int i;
char stats_dir_filename[MAX_SYSFS_FILENAME_LEN];
if (!p)
@@ -520,7 +520,8 @@ static int kfd_procfs_add_sysfs_stats(struct kfd_process *p)
* - proc/<pid>/stats_<gpuid>/evicted_ms
* - proc/<pid>/stats_<gpuid>/cu_occupancy
*/
- list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
+ for (i = 0; i < p->n_pdds; i++) {
+ struct kfd_process_device *pdd = p->pdds[i];
struct kobject *kobj_stats;
snprintf(stats_dir_filename, MAX_SYSFS_FILENAME_LEN,
@@ -571,7 +572,7 @@ static int kfd_procfs_add_sysfs_stats(struct kfd_process *p)
static int kfd_procfs_add_sysfs_files(struct kfd_process *p)
{
int ret = 0;
- struct kfd_process_device *pdd;
+ int i;
if (!p)
return -EINVAL;
@@ -584,7 +585,9 @@ static int kfd_procfs_add_sysfs_files(struct kfd_process *p)
* - proc/<pid>/vram_<gpuid>
* - proc/<pid>/sdma_<gpuid>
*/
- list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
+ for (i = 0; i < p->n_pdds; i++) {
+ struct kfd_process_device *pdd = p->pdds[i];
+
snprintf(pdd->vram_filename, MAX_SYSFS_FILENAME_LEN, "vram_%u",
pdd->dev->id);
ret = kfd_sysfs_create_file(p, &pdd->attr_vram, pdd->vram_filename);
@@ -875,21 +878,23 @@ void kfd_unref_process(struct kfd_process *p)
kref_put(&p->ref, kfd_process_ref_release);
}
+
static void kfd_process_device_free_bos(struct kfd_process_device *pdd)
{
struct kfd_process *p = pdd->process;
void *mem;
int id;
+ int i;
/*
* Remove all handles from idr and release appropriate
* local memory object
*/
idr_for_each_entry(&pdd->alloc_idr, mem, id) {
- struct kfd_process_device *peer_pdd;
- list_for_each_entry(peer_pdd, &p->per_device_data,
- per_device_list) {
+ for (i = 0; i < p->n_pdds; i++) {
+ struct kfd_process_device *peer_pdd = p->pdds[i];
+
if (!peer_pdd->vm)
continue;
amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(
@@ -903,18 +908,19 @@ static void kfd_process_device_free_bos(struct kfd_process_device *pdd)
static void kfd_process_free_outstanding_kfd_bos(struct kfd_process *p)
{
- struct kfd_process_device *pdd;
+ int i;
- list_for_each_entry(pdd, &p->per_device_data, per_device_list)
- kfd_process_device_free_bos(pdd);
+ for (i = 0; i < p->n_pdds; i++)
+ kfd_process_device_free_bos(p->pdds[i]);
}
static void kfd_process_destroy_pdds(struct kfd_process *p)
{
- struct kfd_process_device *pdd, *temp;
+ int i;
+
+ for (i = 0; i < p->n_pdds; i++) {
+ struct kfd_process_device *pdd = p->pdds[i];
- list_for_each_entry_safe(pdd, temp, &p->per_device_data,
- per_device_list) {
pr_debug("Releasing pdd (topology id %d) for process (pasid 0x%x)\n",
pdd->dev->id, p->pasid);
@@ -927,8 +933,6 @@ static void kfd_process_destroy_pdds(struct kfd_process *p)
amdgpu_amdkfd_gpuvm_destroy_process_vm(
pdd->dev->kgd, pdd->vm);
- list_del(&pdd->per_device_list);
-
if (pdd->qpd.cwsr_kaddr && !pdd->qpd.cwsr_base)
free_pages((unsigned long)pdd->qpd.cwsr_kaddr,
get_order(KFD_CWSR_TBA_TMA_SIZE));
@@ -949,7 +953,9 @@ static void kfd_process_destroy_pdds(struct kfd_process *p)
}
kfree(pdd);
+ p->pdds[i] = NULL;
}
+ p->n_pdds = 0;
}
/* No process locking is needed in this function, because the process
@@ -961,7 +967,7 @@ static void kfd_process_wq_release(struct work_struct *work)
{
struct kfd_process *p = container_of(work, struct kfd_process,
release_work);
- struct kfd_process_device *pdd;
+ int i;
/* Remove the procfs files */
if (p->kobj) {
@@ -970,7 +976,9 @@ static void kfd_process_wq_release(struct work_struct *work)
kobject_put(p->kobj_queues);
p->kobj_queues = NULL;
- list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
+ for (i = 0; i < p->n_pdds; i++) {
+ struct kfd_process_device *pdd = p->pdds[i];
+
sysfs_remove_file(p->kobj, &pdd->attr_vram);
sysfs_remove_file(p->kobj, &pdd->attr_sdma);
sysfs_remove_file(p->kobj, &pdd->attr_evict);
@@ -1020,7 +1028,7 @@ static void kfd_process_notifier_release(struct mmu_notifier *mn,
struct mm_struct *mm)
{
struct kfd_process *p;
- struct kfd_process_device *pdd = NULL;
+ int i;
/*
* The kfd_process structure can not be free because the
@@ -1044,8 +1052,8 @@ static void kfd_process_notifier_release(struct mmu_notifier *mn,
* pdd is in debug mode, we should first force unregistration,
* then we will be able to destroy the queues
*/
- list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
- struct kfd_dev *dev = pdd->dev;
+ for (i = 0; i < p->n_pdds; i++) {
+ struct kfd_dev *dev = p->pdds[i]->dev;
mutex_lock(kfd_get_dbgmgr_mutex());
if (dev && dev->dbgmgr && dev->dbgmgr->pasid == p->pasid) {
@@ -1081,11 +1089,11 @@ static const struct mmu_notifier_ops kfd_process_mmu_notifier_ops = {
static int kfd_process_init_cwsr_apu(struct kfd_process *p, struct file *filep)
{
unsigned long offset;
- struct kfd_process_device *pdd;
+ int i;
- list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
- struct kfd_dev *dev = pdd->dev;
- struct qcm_process_device *qpd = &pdd->qpd;
+ for (i = 0; i < p->n_pdds; i++) {
+ struct kfd_dev *dev = p->pdds[i]->dev;
+ struct qcm_process_device *qpd = &p->pdds[i]->qpd;
if (!dev->cwsr_enabled || qpd->cwsr_kaddr || qpd->cwsr_base)
continue;
@@ -1162,7 +1170,7 @@ static struct kfd_process *create_process(const struct task_struct *thread)
mutex_init(&process->mutex);
process->mm = thread->mm;
process->lead_thread = thread->group_leader;
- INIT_LIST_HEAD(&process->per_device_data);
+ process->n_pdds = 0;
INIT_DELAYED_WORK(&process->eviction_work, evict_process_worker);
INIT_DELAYED_WORK(&process->restore_work, restore_process_worker);
process->last_restore_timestamp = get_jiffies_64();
@@ -1244,11 +1252,11 @@ static int init_doorbell_bitmap(struct qcm_process_device *qpd,
struct kfd_process_device *kfd_get_process_device_data(struct kfd_dev *dev,
struct kfd_process *p)
{
- struct kfd_process_device *pdd = NULL;
+ int i;
- list_for_each_entry(pdd, &p->per_device_data, per_device_list)
- if (pdd->dev == dev)
- return pdd;
+ for (i = 0; i < p->n_pdds; i++)
+ if (p->pdds[i]->dev == dev)
+ return p->pdds[i];
return NULL;
}
@@ -1258,6 +1266,8 @@ struct kfd_process_device *kfd_create_process_device_data(struct kfd_dev *dev,
{
struct kfd_process_device *pdd = NULL;
+ if (WARN_ON_ONCE(p->n_pdds >= MAX_GPU_INSTANCE))
+ return NULL;
pdd = kzalloc(sizeof(*pdd), GFP_KERNEL);
if (!pdd)
return NULL;
@@ -1286,7 +1296,7 @@ struct kfd_process_device *kfd_create_process_device_data(struct kfd_dev *dev,
pdd->vram_usage = 0;
pdd->sdma_past_activity_counter = 0;
atomic64_set(&pdd->evict_duration_counter, 0);
- list_add(&pdd->per_device_list, &p->per_device_data);
+ p->pdds[p->n_pdds++] = pdd;
/* Init idr used for memory handle translation */
idr_init(&pdd->alloc_idr);
@@ -1418,28 +1428,6 @@ struct kfd_process_device *kfd_bind_process_to_device(struct kfd_dev *dev,
return ERR_PTR(err);
}
-struct kfd_process_device *kfd_get_first_process_device_data(
- struct kfd_process *p)
-{
- return list_first_entry(&p->per_device_data,
- struct kfd_process_device,
- per_device_list);
-}
-
-struct kfd_process_device *kfd_get_next_process_device_data(
- struct kfd_process *p,
- struct kfd_process_device *pdd)
-{
- if (list_is_last(&pdd->per_device_list, &p->per_device_data))
- return NULL;
- return list_next_entry(pdd, per_device_list);
-}
-
-bool kfd_has_process_device_data(struct kfd_process *p)
-{
- return !(list_empty(&p->per_device_data));
-}
-
/* Create specific handle mapped to mem from process local memory idr
* Assumes that the process lock is held.
*/
@@ -1515,11 +1503,13 @@ struct kfd_process *kfd_lookup_process_by_mm(const struct mm_struct *mm)
*/
int kfd_process_evict_queues(struct kfd_process *p)
{
- struct kfd_process_device *pdd;
int r = 0;
+ int i;
unsigned int n_evicted = 0;
- list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
+ for (i = 0; i < p->n_pdds; i++) {
+ struct kfd_process_device *pdd = p->pdds[i];
+
r = pdd->dev->dqm->ops.evict_process_queues(pdd->dev->dqm,
&pdd->qpd);
if (r) {
@@ -1535,7 +1525,9 @@ int kfd_process_evict_queues(struct kfd_process *p)
/* To keep state consistent, roll back partial eviction by
* restoring queues
*/
- list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
+ for (i = 0; i < p->n_pdds; i++) {
+ struct kfd_process_device *pdd = p->pdds[i];
+
if (n_evicted == 0)
break;
if (pdd->dev->dqm->ops.restore_process_queues(pdd->dev->dqm,
@@ -1551,10 +1543,12 @@ int kfd_process_evict_queues(struct kfd_process *p)
/* kfd_process_restore_queues - Restore all user queues of a process */
int kfd_process_restore_queues(struct kfd_process *p)
{
- struct kfd_process_device *pdd;
int r, ret = 0;
+ int i;
+
+ for (i = 0; i < p->n_pdds; i++) {
+ struct kfd_process_device *pdd = p->pdds[i];
- list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
r = pdd->dev->dqm->ops.restore_process_queues(pdd->dev->dqm,
&pdd->qpd);
if (r) {
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
index eb1635ac8988..95a6c36cea4c 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
@@ -126,10 +126,10 @@ int pqm_set_gws(struct process_queue_manager *pqm, unsigned int qid,
void kfd_process_dequeue_from_all_devices(struct kfd_process *p)
{
- struct kfd_process_device *pdd;
+ int i;
- list_for_each_entry(pdd, &p->per_device_data, per_device_list)
- kfd_process_dequeue_from_device(pdd);
+ for (i = 0; i < p->n_pdds; i++)
+ kfd_process_dequeue_from_device(p->pdds[i]);
}
int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p)
--
2.29.2
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